SOLUTION: Tad’s sister Tina asks him how old he is. Tad tells her that if she squares his age Nd subtracts 3 times his age the result is 40. How old is Tad?

Question 1164985: Tad’s sister Tina asks him how old he is. Tad tells her that if she squares his age Nd subtracts 3 times his age the result is 40. How old is Tad?
Answer by ikleyn(52788) (Show Source): You can put this solution on YOUR website!
.


     -  = 40

    T*(T-3) = 40


So, the number 40 is the product of two integer factors that differ by 3.


Quick guessing gives you the answer T = 8 :  Tad is 8 years old.


CHECK.  8^2 - 3*8 = 64 - 24 = 40.   ! Correct !

Solved.

For an 8-year boy, Tad demonstrates pretty good calculation skills (!)

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